from django.shortcuts import render
from django.views import View
from .lib.captcha.captcha import captcha
from django_redis import get_redis_connection
from django import http
from meiduo_mall.utils import constants
from meiduo_mall.utils.response_code import RETCODE
import logging
import random
from meiduo_mall.apps.verifications.lib.yuntongxun.ccp_sms import CCP
from celery_tasks.sms.tasks import ccp_send_sms_code


#  创建日志输出器
logger = logging.getLogger('django')


# Create your views here.
class ImageCodeView(View):
    """图形验证码"""

    def get(self, request, uuid):
        """

        :param request:请求对象
        :param uuid: 唯一标识图形验证码所属于的用户
        :return: image/jpg
        """
        #  生成图片验证码
        text, image = captcha.generate_captcha()

        #  保存图片验证码
        redis_conn = get_redis_connection('verify_code')
        redis_conn.setex('img_%s' % uuid, constants.IMAGE_CODE_REDIS_EXPIRES, text)

        #  响应图片验证码
        return http.HttpResponse(image, content_type='image/jpg')


class SMSCodeView(View):
    """短信验证码"""

    def get(self, request, mobile):
        """

        :param request:请求对象
        :param mobile: 手机号
        :return: Json
        """
        #  接收参数
        image_code_client = request.GET.get('image_code')
        uuid = request.GET.get('uuid')

        #  校验参数
        if not all([image_code_client, uuid]):
            return http.JsonResponse({'code': RETCODE.NECESSARYPARAMERR, 'errmsg': '缺少必传参数'})

        #  创建连接到redis对象
        redis_conn = get_redis_connection('verify_code')

        #  提取校验send_flag
        send_flag = redis_conn.get('send_flag_%s' % mobile)
        if send_flag:
            return http.JsonResponse({'code': RETCODE.THROTTLINGERR, 'errmsg': '发送短信过于频繁'})

        #  提取图形验证码
        image_code_server = redis_conn.get('img_%s' % uuid)
        if image_code_server is None:
            #  图形验证码过期或者不存在
            return http.JsonResponse({'code': RETCODE.IMAGECODEERR, 'errmsg': '图形验证码失效'})

        #  删除图形验证码，避免恶意测试图形验证码
        try:
            redis_conn.delete('img_%s' % uuid)
        except Exception as e:
            logger.error(e)

        #  对比图形验证码
        image_code_server = image_code_server.decode()  # bytes转字符串
        if image_code_client.lower() != image_code_server.lower():  # 转成小写后在比较
            return http.JsonResponse({'code': RETCODE.IMAGECODEERR, 'errmsg': '输入的图形验证码有误！'})

        #  生成短信验证码，生成6位数验证码
        sms_code = '%06d' % random.randint(0, 999999)
        logger.info(sms_code)

        # # 重新写入send_flag
        # # 保存短信验证码
        # redis_conn.setex('sms_%s' % mobile, constants.SMS_CODE_REDIS_EXPIRES, sms_code)
        # # 重新写入send_flag
        # redis_conn.setex('send_flag_%s' % mobile, constants.SEND_SMS_CODE_INTERVAL, 1)

        #  保存短信验证码
        # redis_conn.setex('sms_%s' % mobile, constants.SMS_CODE_REDIS_EXPIRES, sms_code)

        #  创建redis管道
        p1 = redis_conn.pipeline()
        #  将redis请求添加到队列
        p1.setex('sms_%s' % mobile, constants.SMS_CODE_REDIS_EXPIRES, sms_code)
        p1.setex('send_flag_%s' % mobile, constants.SEND_SMS_CODE_INTERVAL, 1)
        #  执行请求
        p1.execute()

        # #  发送短信验证码
        # CCP().send_template_sms(mobile, [sms_code, constants.IMAGE_CODE_REDIS_EXPIRES // 60, constants.SEND_SMS_TEMPLATE_ID])
        # celery异步发送短信验证码
        ccp_send_sms_code.delay(mobile, sms_code)  # 必须得写delay

        #  响应结果
        return http.JsonResponse({'code': RETCODE.OK, 'errmsg': '发送短信成功'})
